Argon information, including Technical Data, Safety Data and its high purity properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included.
Argon was discovered by Lord Raleigh and Sir William Ramsay in 1894.
Argon Abundance. The following table shows the abundance of argon and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope. |
Argon 
Argon
Argo 
Argônio 
argón 
ArgonIsotope |
Atomic Mass |
% Abundance on Earth |
Ar-36 |
35.9675463 |
0.34 |
Ar-37 |
36.9667759 |
- |
Ar-38 |
37.9627322 |
0.06 |
Ar-39 |
38.964313 |
- |
Ar-40 |
39.962383123 |
99.60 |
Argon Safety Data. The safety data for argon metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin.
Ionization Energy. The ionization energy for argon (the least required energy to release a single electron from the atom in it's ground state in the gas phase) is stated in the following table: |
1st Ionization Energy |
1520.58 kJ mol-1 |
2nd Ionization Energy |
2665.88 kJ mol-1 |
3rd Ionization Energy |
3930.84 kJ mol-1 |
Conductivity. As to argon's electrical and thermal conductivity, the electrical conductivity measured in terms of electrical resistivity @ 20 ºC is - µOcm and its electronegativities (or its ability to draw electrons relative to other elements) is -. The thermal conductivity of argon is 0.0179 W m-1 K-1.
Thermal Properties of Argon. The melting point and boiling point for argon are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization. |
Heat of Fusion |
1.21 kJ mol-1 |
Heat of Vaporization |
6.53 kJ mol-1 |
Heat of Atomization |
0 kJ mol-1 |
| Formula | Atomic Number | Molecular Weight | Electronegativity (Pauling) | Density | Melting Point | Boiling Point |
Vanderwaals radius |
Ionic radius | Energy of first ionization |
| Ar | 18 | 39.948 g.mol -1 | 0.08988 g.cm-3 | -189.34 °C | -185.89 °C | .154 nm | 188 pm | 1520.58 kJ.mol-1 |
| PRODUCT CATALOG | U.S. Operations | Submicron & Nanopowder | Tolling | Ultra High Purity | Sputtering Target | Crystal Growth | Rod, Plate, Powder, etc. | Foil |
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